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A tunable waveguide to cavity coupler for high power accelerator cavities

DSpace at IIT Bombay

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Title A tunable waveguide to cavity coupler for high power accelerator cavities
 
Creator KUMAR, R
SINGH, P
UNNIKRISHNAN, D
KUMAR, G
 
Subject Waveguide iris coupler
Ridge waveguide coupler
Coupling coefficient
Waveguide to cavity coupling
External quality factor
Tunable coupler
COEFFICIENT
 
Description The end iris ridge waveguide couplers are used to couple power to accelerator cavities through a reduced size coupling port. However, higher electric and magnetic fields due to reduced size lead to strict requirements on dimensional tolerances during coupler fabrication process. It is shown by detailed parametric analysis that even small dimensional changes during manufacturing or operation can lead to undesired shift in design frequency and deterioration of return loss. Hence, transmitted power testing of two couplers connected back to back without an intermediate cavity cannot be carried out. Here, we propose cylindrical static tuners on impedance matching section to relax the dimensional tolerance requirements. It is also shown that an iris coupled coupler-cavity system is more tolerant towards coupler dimensional changes than a stand-alone coupler. However, same tuners can find use for tuning the coupling coefficient of coupler-cavity system. The proposed tuning scheme is expected to reduce the coupler manufacturing costs and provide an useful alternative for coupling coefficient tuning over iris machining. (C) 2011 Elsevier B.V. All rights reserved.
 
Publisher ELSEVIER SCIENCE BV
 
Date 2014-10-16T05:37:06Z
2014-10-16T05:37:06Z
2012
 
Type Article
 
Identifier NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 664(1)203-213
http://dx.doi.org/10.1016/j.nima.2011.10.032
http://dspace.library.iitb.ac.in/jspui/handle/100/15354
 
Language en